Question

Find the lateral surface area of the figure.

A. 798 sq ft
B. 210 sq ft
C. 816.8 sq ft
D. 69.7 sq ft

Answer 1

it is C.) 816.8 sq ft

Explanation:

Because i took the test and 1/1 point means i got it right

Answer 2

Surface area of the cylinder = 816.4 sq. ft.

Solution:

Height of the cylinder = 21 ft

Diameter of the cylinder = 10 ft

Radius of the cylinder = 10 ÷ 2 = 5 ft

Use the value of
`\pi` = 3.14

Surface area of the cylinder =
`2 \pi r h+2 \pi r^(2)`

Substitute the given values in the surface area formula, we get

Surface area of the cylinder
`$=2*3.14* 5* 21+2 *3.14* 5^2`

`=659.4+157`

`=816.4` ft²

Hence the surface area of the cylinder is 816.4 sq. ft.